QUESTION: 21

Which of the following commands puts the output of the command date into the shell variable mydate?

mydate="$(date)"
mydate="exec date"
mydate="$((date))"
mydate="date"
mydate="${date}"

Answer(s): A

QUESTION: 22

What word is missing from the following SQL statement?

__________ count(*) from tablename;

(Please specify the missing word using lower-case letters only.)

select
delete
display
update

Answer(s): A

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QUESTION: 23

When the command echo $$ outputs 12942, what is the meaning of 12942?

It is the process ID of the echo command.
It is the process ID of the current shell.
It is the process ID of the last command executed.
It is the process ID of the last command which has been placed in the background.

Answer(s): B

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